FEB. 1903. PLANTVE YUCATAN^: MILLSPAUGH & CHASE. 



73 



strongly nerved, nearly twice the length of the achene. Style longer 

 than the achene, divided to near the base. Achene dull-black when 



ripe, broadly obovoid, .7 .9x1.4 

 mm., in section flatly triangular, 

 the facets plane, the ventral hav- 

 ing a prominent rounded margin 

 at the angles, and all three 

 marked by nearly regular hexa- 

 gonal grooves, each interspace 

 occupied by a deep circular pit 

 with a raised lip. 



Hab. Celestun, May 13, 

 1864, Schott 412 ; on the apex of 

 reef rocks, north end of the 

 island of Mugeres, Jan. 2, 1895, Millspaugh, Armour Exped. 22 (Cyperus 

 Ottonis Field Col. Mus. Bot. 1:11); seashore near lagoon, Progreso, 

 March 5, 1899, Millspaugh PI. Utoivance 1697, southwest end of Perez 

 Island, Alacran Shoal, March 8, 1899, 1746 (Cyperus Ottonis Field Col. 

 Mus. Bot. 2:29, and Cyperus brizeus ibid. p. 122.) 



TORULINIUM. Characters of Mariscus except: Spikelets terete 

 or subterete; rachilla deciduous in i -fruited nodes, with broad 

 wings clasping the achene. Spikelets more loosely disposed in 

 pectinate or digitate spikes. 



Cyperus ferax L. C. Rich. Act, Soc. Hist. Nat. 1:106. 



Torulinium confer turn Ham. 



Torulinium ferax Urb. 



Bracts leaf-like, 1-4 dm. long. Inflorescence in a compound 

 spreading umbel, 1020 cm. wide ; primary rays 3-6, i 10 cm. long ; 

 secondary rays 1-2 cm. long. Spikes broadly flabellate in outline, 

 2.5-4x3.5-4.5 cm., composed of 16-20 pectinately spreading' spike- 

 lets. Spikelets rufous, subterete, linear, zigzag, i x 15-30 mm., 5-12- 

 fruited; rachilla wings large, enfolding the achene. Glumes rufous, 

 closely appressed to the rachilla, those of the same rank separated 

 from each other fora distance 

 equal to % their length, all 

 ovate, obtuse, less than twice 

 the length of the achene, the 

 dorsum convex, not keeled, 

 the median stripe broad, 

 green, 7- nerved. Style 



twice the length of the 

 achene, divided for ^ its 

 length. Achene black, 

 elongate-obovate, .45-. 55 x 

 1.8 mm.; in section triangu- 

 lar, the dorsal facets plane, 

 the ventral deeply convex; facets with sharp, hexagonal reticulations 

 enclosing semiglobular papillae. 



Hab. Common in moist, shady places near Izamal, 3. feet high, 

 Gaumer 2483, 1035 (Cyperus sp. Field Col. Mus. Bot. 1:354), Chichan- 



